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Website
Society for Science and the Public

Science News for Students: Riding to Earth's Core

For Students 3rd - 5th
Ever thought about riding to the core of the earth? Well geophysists David Stevenson has. He has even come up with a way to make a hole, but he has run into some other complications. Maybe you can be the one to solve those problems.
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Interactive
The Tech Interactive

The Tech: The Core of the Matter

For Students 3rd - 8th
Use this website as a great introduction to one of the basic parts of the inside of the earth, the core. Also provides a short description and cross-section of the Earth.